.demo {
  position: relative;
  transition: .2s ease;
}
.grid {
  position: relative;
  width: auto;
  list-style: none;
  padding: 0;
  margin: 0 auto;
}
.grid-item {
  position: absolute;
  top: 0;
  left: 0;
  width: 23%;
  height: auto;
  border-radius: 5px;
  background-color: #fff;
  -webkit-transition: 0.3s ease-in-out;
  -o-transition: 0.3s ease-in-out;
  transition: 0.3s ease-in-out;
  border: 1px solid #e3e3e3;
}
@media (max-width: 1366px) {
  .proNews .tab-tit {
    padding: 30px 0 20px;
  }
  .proNews .tab-tit .tab-list2 {
    margin-left: 40px;
  }
  .grid-item {
    width: 30% !important;
  }
}
@media (max-width: 900px) {
  .grid-item {
    width: 29% !important;
  }
}
@media (max-width: 767px) {
  .proNews .tab-tit {
    padding: 30px 15px 20px;
  }
  .grid-item {
    width: 45% !important;
  }
}
@media (max-width: 610px) {
  .grid-item {
    width: 44% !important;
  }
}
@media (max-width: 510px) {
  .proNews .grid {
    margin-left: -8px;
  }
  .proNews .tab-tit {
    padding-bottom: 0;
  }
  .proNews .tab-tit .search {
    float: none;
  }
  .grid-item {
    width: 92% !important;
  }
}
